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App & Website Rules

LinguaX drives automatic input source switching with two rule types. Both sit on top of Mouse+, which is configured separately and runs alongside them.

The Two Rule Types​

App Rule — applies when a specific app is in the foreground. Use it for IDEs and editors, terminals, design tools, and chat apps.

  • Cursor → English
  • WeChat → Chinese

Website / Domain Rule — applies to a domain inside a browser. Use it for documentation sites, internal dashboards, AI chat tools, and region-specific websites.

  • docs.example.com → English
  • chat.example.cn → Chinese

A single browser usually holds mixed contexts at once: docs, chat, admin tools, local platforms. Domain rules prevent one broad browser default from breaking every tab.

Priority Model​

  1. LinguaX detects the active app.
  2. For non-browser apps, the matching app rule applies.
  3. For browsers, a matching domain rule takes priority over the browser app default.

Configure an App Rule​

  1. Open the app rules list.
  2. Add the target app.
  3. Set its input source.
  4. Save and enable.

Start with your top 3 daily apps.

Configure a Domain Rule​

  1. Confirm the browser app rule baseline works first.
  2. Open the website / domain rules list.
  3. Select the browser, add the domain, and set the target input source.
  4. Save and enable.

Exact Matching Tips​

  • Use exact domains like docs.example.com.
  • Avoid duplicate rules for the same domain.
  • Keep rules narrow before introducing broad patterns.
  • Keep the browser app default simple and let domain rules refine it.

Verify & Troubleshoot​

  1. Open two configured domains in separate tabs and switch between them.
  2. Leave the browser and confirm non-browser app rules still work.

If a rule does not trigger:

  • check domain spelling and rule enabled state
  • remove overlapping broad rules
  • restart the browser and LinguaX

If it still fails, see Common Issues.